Pellets are available from a number of sources because they are popular for use in home heaters, so if you are worried that you will be buying a gizmo that might be worthless someday if the pellet supply runs out, it is unlikely. As more and more pellet grills appear, and word of their excellence spreads, sources for pellets will become numerous. I've even heard of a few Home Depot's carrying them. The bad news is that I have tried several brands and I always return to BBQr's Delight. They seem to have the least sawdust, so they are less likely to clog the auger, and they have a higher percentage of the flavor wood on the label.
The Ortech has two knobs. The large one, the "Cook Control" has settings for: Off, Smoke, 180, 225, 250, 275, 300, 325, 350, 375, and High. One smoker manufacturer says that the "Smoke" setting is about 160°F and "high" is about 525°F, but both can vary due to ambient temperature, humidity, fuel type and quality of the smoker. Another knob, a teensy weensy knob to the right of the LED screen looks more like a push button. Labeled "SMOKE" and called the "Smoke Control Knob", it is meant to turn, not push, and it controls the pellet feed rate with auger on/off sequences indicated by "P settings". The P settings range from P0 to P15.
My husband used my two cast iron dutch ovens to make corned beef, but neglected to wash out the pots afterward. Needless to say, when I discovered the ruination of the years of seasoning destroyed by the salt brine, I wanted to cry. This product is so much better than using vegetable oil or shortening as I have done in the past. It seals the surfaces well and does not leave a sticky residue. Hope it gets back to at least an approximation of the old coating. Only time will tell.
Although these are marketed as grills, they do much more, including baking or roasting. Because they heat by convection, you might not get the grill marks that a gas or charcoal grill will give you, but you also won’t have the flame-up problems. While many pellet grills offer high cooking temperatures, the maximum depends on ambient temperature and wind. Many users wrap their grills in special insulating covers to help maintain heat, reduce fuel use, and reach the higher temperatures they desire.